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@eine tet-tts stmt @ffice GEORGE A LAUDER, O'F PITTSR'G, PENNSYLVANIA., lLam-s Parma No: 65,242, am@ May, ce, leer.

IMPBOVBD MACHINE. POR STRAIGHTENING (BARS.

T0 ALL WHOM IT MAY CONCERNE Be it known .that I, GEORGE LAUDER, of Pittsburg, in the county of Allegheny, and State of Pennsylvania, have invented certain new and useful improvements in Machines for straightening Bars; and I do hereby declare that the following is a full and exact description thereof. I

M-y invention relates to the straightening of iron, copper, or other like material by rolling it between surfaces which traverse in the same direction. The bar is treated between two rollers 'which are'turned in the same direction, so that consequently the adjacent surfaces traverse in the opposite direction. -The bar of iron .is compressed between these two rollers, and is turned rapidly around by the rotation of the rollers. '.lhe axes of the rolls beings properly set oblique to cach other, and to the axis ofthe bar which is being straightened, it follows that the bar is traversed slowly along endwise, so that all portions are presented to the straightening action of the rolls, and the bar isflnally delivered straight, orivery nearly straight. This general mode of operation has been before known, and has been employed with some success.

My invention consists in an improved means for cf'inimunicatingmotion to such rolls, whereby greater simplicity, and a steadier motion, and more perfect results are obtained. The accompanying drawings form apart of this specification. i l

Figure l is a side view, and

Figure 2 is an end view.

Similar letters of reference indicate like parts in both figures.

The drawings represents the novel portions, with so much ot' the other portions as is necessary `to indicate their relation thereto. i

A is the ixed framing of the machine; B and C are the straightening rolls; and B, C1 arestout worm-wheels fixed on the 'axis thereof, in the manner represented.4 The bearings of the rolls may be carried in adjustable boxes; and the machine may be provided 'generally with all the appliances which are usual in such machines for` adapting it to the different sizes and conditions of the material to be operated on. D is a cross-bar, which may be fixed to the framework, either permanently or adjustably, and which forms a support or guide for the bar which is heilig straightened, to prevent itsdesccnding in any contingencies below the proper level. The force of gravity will 'carry it down into the bite,of the rolls, and the steady motion of the rolls due to my invention avoids much of the unsteadi-ness and tendency to agitato the bar Ywhich interferes with the success of the straightening process as usually conducted by such mechanism. E is the driving-worm. It is carried in bearings on the fixed framework A, as represented, and is driven by belting or other suitable means from a steam engine or other convenient motor. There are several threads c on the worin E, and the pitch ofthe several threads is properly adjusted `to the pitch of the worm-wheels I3, and U1,

The parts heilig properly fitted together and lubricated, the bars may he introduced by hand, or by any suitable mechanisml in the direction indicated by the red arrow, and will be carried through in the position indicated by the red outlines marked M. On being slowly discharged from the machine the bars may be received on any suitable surface, either rolling or stationary.

I do not confine myself to any specific number of threads e, or to any precise anglo thereof. A single thread on the worm E would give a motion which would be very slow, unless the pitch of the thread, and conscquently of the teeth or scores in the periphery of the worin-wheels B, C, were very coarse, and too great coarseness of these parts militates against the smoothness of motion which is required. I deem it very important to employ two or more threads on the worm E. It will be obvious that the worm E need not be provided with threads, except in those small portions of its length which act on the worm-wheels 3, 0,. Quite large bars may pass through my machine without coming in contact with any surfaces except those portions of the rolls which are eiiicient in straightening. I do not confine myself to the employment of V-shaped threads. 'lhe shape of the threads e, and of the corresponding surfacesmn the worm-wheels B, G1, may be any approved form allowable, but I prefer the V-shape represented, giving by preference a square or less oblique snrface'eu the sides of the threads which give and receive the principal strain.

Having now fully described my invention, whatI claim as new therein, and desire to secure by Letters Patent, is as follows:

I claim thc worm E, and worm-wheels B, and 0 arranged relatively to the skewed straightening-rolls l) C, and to the housing A, or its equivalent, substantially as and for thc purpose herein set forth. i

GEORGE LAUDER.

Witncssesi p Tues. M. OAnNnen-i,

G. InAnTsen. 

